package com.twj.gulimall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.twj.common.constant.ProductConstant;
import com.twj.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.twj.gulimall.product.dao.AttrGroupDao;
import com.twj.gulimall.product.dao.CategoryDao;
import com.twj.gulimall.product.entity.*;
import com.twj.gulimall.product.service.CategoryService;
import com.twj.gulimall.product.vo.AttrGroupRelationVo;
import com.twj.gulimall.product.vo.AttrRespVo;
import com.twj.gulimall.product.vo.AttrVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.twj.common.utils.PageUtils;
import com.twj.common.utils.Query;

import com.twj.gulimall.product.dao.AttrDao;
import com.twj.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    private AttrAttrgroupRelationDao attrAttrgroupRelationDao;

    @Autowired
    private AttrGroupDao attrGroupDao;

    @Autowired
    private CategoryDao categoryDao;

    @Autowired
    private CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        // 保存基本数据
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.save(attrEntity);

        // 保存关联关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            attrAttrgroupRelationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type", "base".equalsIgnoreCase(type)?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

        // 如果传入的分类id为0表示查询所有分类
        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }
        // 判断并添加其他查询条件
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and(wrapper -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );
        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map(attrEntity -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            // 查询并设置分类和分组的名字
            if ("base".equalsIgnoreCase(type)) {
                AttrAttrgroupRelationEntity attrAttrgroup = attrAttrgroupRelationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
                if (attrAttrgroup != null && attrAttrgroup.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroup.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(respVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        // 将查询出的属性对象封装至属性的返回对象中
        AttrEntity attrEntity = this.getById(attrId);
        AttrRespVo respVo = new AttrRespVo();
        BeanUtils.copyProperties(attrEntity, respVo);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            // 设置返回对象的属性组信息
            AttrAttrgroupRelationEntity attrgroupRelation = attrAttrgroupRelationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
            if (attrgroupRelation != null) {
                respVo.setAttrGroupId(attrgroupRelation.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelation.getAttrGroupId());
                if (attrGroupEntity != null) {
                    respVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }

        // 设置返回对象的分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        respVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            respVo.setCatelogName(categoryEntity.getName());
        }
        return respVo;
    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        // 属性基本信息修改
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            // 修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());

            // 判断数据库中本身是否存在关联的分组信息
            Integer count = attrAttrgroupRelationDao.selectCount(new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            if (count > 0) { // 如果存在就修改
                attrAttrgroupRelationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            } else { // 不存在则新增
                attrAttrgroupRelationDao.insert(relationEntity);
            }
        }


    }

    /**
     * 根据分组id查找关联的所有属性
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> relationEntities = attrAttrgroupRelationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));
        List<Long> arrtIds = relationEntities.stream().map(attr -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());

        if (arrtIds == null || arrtIds.size() == 0) {
            return null;
        }

        Collection<AttrEntity> attrEntities = this.listByIds(arrtIds);
        return (List<AttrEntity>) attrEntities;
    }

    /**
     * 删除属性与分组的关联
     * @param vos
     */
    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        // attrAttrgroupRelationDao.delete(new QueryWrapper<>().eq("attr_id", 1L).eq("attr_group_id", 1L));
        // 将获取到的属性分组关联vo转为属性分组关联实体类
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map(item -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());

        // 调用dao进行批量删除
        attrAttrgroupRelationDao.deleteBatchRelation(entities);
    }

    /**
     * 获取当前分组没有关联的所有属性
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        // 当前分组只能关联所属分类里的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        // 当前分组只能关联别的分组没有引用的属性
        // 1.获取当前分类下的所有分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());
        // 2.获取这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = attrAttrgroupRelationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
        List<Long> attrIds = groupId.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());
        // 3.从当前分类的所有属性中移除这些属性
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if (attrIds != null && attrIds.size() != 0) {
            queryWrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.and(w -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);
        PageUtils pageUtils = new PageUtils(page);

        // 返回当前分组没有关联的所有属性
        return pageUtils;
    }

    /**
     * 在指定的所有属性集合汇总,筛选出检索属性
     * @param attrIds
     * @return
     */
    @Override
    public List<Long> selectSearchAttrs(List<Long> attrIds) {

        return this.baseMapper.selectSearchAttrs(attrIds);
    }


}